Darien Town property record for 21 Hillside Ave, Darien, CT 06820
| Property Type | Single Family Home |
|---|---|
| Details | 2 bd · 1.5 ba · 1,309 sqft · built 1915 |
| Lot Size | 0.15 acres (6,534 sqft) |
| Owner | 2 Individual Names on Record |
| Last Sale | $805,000 (Dec 2021) |
| Tax Bill | $10,642 (2025) |
| Deeds & Mortgages | Jan 2021 Mortgage Dec 2021 Sale & Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | DARI M:47 B:33 |
| Primary APN | DARI M:47 B:33 |
|---|---|
| Alternative APN |
|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 1.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 6 Rooms |
| Stories | 2 Stories |
| Building Area | 1,309 sqft Living Area |
| 1st Floor Area | 744 sqft |
| Basement Area | 2,116 sqft |
| Unfinished Basement | 2,116 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1915 |
|---|---|
| Effective Year Built | Effective 2016 |
| Architectural Style | Other |
| Exterior Material | Wood Siding |
| Roof Type | Gable |
| Roof Material | Asphalt |
| Lot Area | 6,534 sqft (0.15 acres) |
| Cooling System | HVAC |
|---|---|
| Heating System | Hot Water |
| Heating Fuel | Oil |
| Account Number | 9035 |
|---|---|
| Street Address | 21 HILLSIDE AVE |
| City | DARIEN |
| State | CT |
| Zip | 06820-5011 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R13 |
| Legal Block | 33 |
| Jurisdiction | DARIEN CT |
| Township / Civil Division | DARIEN |
| Census Block Group | 3 |
| Census Block | 3007 |
| Census Tract | 30400 |
Source: Darien Town records, as of June 25, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | 2 Individual Names on Record |
|---|---|
| Mailing Address | 21 HILLSIDE AVE, DARIEN, CT 06820-5011 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Date | Document |
|---|---|
| Jan 20, 2021 | Deed of Trust, Mortgage · Balloon Mortgage PROSPERITY HOME MORTGAGE LLC |
| Dec 2, 2021 | Warranty Deed, Transfer · Stand-Alone First Mortgage US MORTGAGE |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Dec 2, 2021 · Amount on Record |
| Deed Sale | Dec 2, 2021 · Amount on Record |
| Prior Sale | May 19, 1995 · Amount on Record |
| Deed Book / Page | 1732 / 1174 |
| Record Updated | Sep 20, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | DARIEN CT |
| Property Address | 21 HILLSIDE AVE, DARIEN, CT 06820-5011 |
| Transaction Type | Mortgage |
| Record Updated | May 27, 2022 |
| Name | Verified Name |
|---|
| Document Number | 0001706-62 |
|---|---|
| Date | Jan 20, 2021 |
| Book Page | 1706/62 |
| Name | PROSPERITY HOME MORTGAGE LLC |
|---|
| Type | Balloon Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | Feb 1, 2051 |
| Document Type | Warranty Deed |
|---|---|
| Jurisdiction | DARIEN CT |
| Recording Date | Dec 2, 2021 |
| Property Address | 21 HILLSIDE AVE, DARIEN, CT 06820-5011 |
| Document Number | 01732-1174 |
| Book / Page | 1732 / 1174 |
| Instrument Date | Dec 1, 2021 |
| Transaction Type | Transfer |
| Record Updated | Jun 27, 2022 |
| Amount | Amount Recorded |
|---|---|
| Downpayment | Downpayment on Record |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $0.00 |
| Amount Accuracy | Full Amount Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Joint Tenants |
| Document Number | 0017321177 |
|---|---|
| Date | Dec 2, 2021 |
| Instrument | 1732/1177 |
| Name | US MORTGAGE |
|---|
| Type | Stand-Alone First Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 373 Months |
| Due | Jan 1, 2053 |
Source: Darien Town assessment roll, as of June 25, 2026
| Type | Name |
|---|---|
| State | Connecticut |
| County Subdivision | Darien Town |
| Unified School District | Darien School District (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2025 | $10,642.00 | $687,470 (+34.46%) Land $547,610 Building $139,860 | $481,229 Land $383,327 Building $97,902 |
| 2024 | $10,642.00 (+18.19%) | ||
| 2023 | $9,004.00 (+2.97%) | $511,280 (+0.74%) Land $391,160 Building $120,120 | |
| 2022 | $8,744.00 | $507,500 Land $391,160 Building $116,340 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
Source: FEMA National Flood Hazard Layer, effective November 28, 2025
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
Values are read at the parcel center point; lenders make the official flood determination.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 80% of the US · above 55% of Connecticut |
|---|---|
| Wildfire Likelihood | 0.01% annual chance |
| Exposure | None beyond ember reach |
Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.
Source: EPA Safe Drinking Water Information System, as of September 2026
| Water System | AQUARION-EASTERN FAIRFIELD COUNTY private · serves 351,756 people · EPA ID CT0150011 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Jun 2025 |
| Lead | Under 1 ppb (2026) action level 15 ppb |
| Water Quality | None last 10 years |
|---|---|
| Treatment and Procedure | None last 10 years |
| Monitoring and Reporting | 24 last 3 years |
Results are for the whole water system, not water tested at this address; lead at the tap also depends on the building's own pipes.
Source: FCC Broadband Data Collection, based on 299 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Optimum Fiber · Cable | 8,000 / 8,000 |
| Frontier Fiber | 7,000 / 7,000 |
| Verizon Fixed Wireless | 300 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
| AT&T Fixed Wireless | 100 / 20 |
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